Melt butter. In a large bowl, combine melted butter, peanut butter, and powdered sugar. Mix until you get a thick dough.
Separate dough into 24 pieces. Using your hands, shape each piece into an egg . Place the peanut butter eggs on a wax-paper lined surface.
Add the chocolate chips and shortening or coconut oil to a microwave safe bowl. Melt together by microwaving in 30 second bursts, stirring in between.
Dip peanut butter eggs into the chocolate, making sure that they are completely coated. Remove eggs from chocolate, shake off excess chocolate, and replace on wax paper.
If you plan to use sprinkles or other decorations, add them while the chocolate is still melted.
Allow eggs to set. They will take about 2 hours at room temperature, or you can put them in the fridge to cut setting time to 30 minutes.
Once the eggs are set, they are ready to eat!